Tune up special. We discovered the unit is very low on refrigerant, needs about 7-8 pounds. Concern is there is a potential leak, recommending die test to locate. Customers capacitor is malfunctioning, it’s working, but it’s on its way out. Recommending hard start. Also biological growth found on the inside of air handler recommending blower wheel pulling clean, as well as mold, clean up. Customer already has a UV light on the inside of the cabinet. Customer system is over 20 years old, so also putting in estimates for full AC unit replacement.